Code 3912 31 · Heading 3912

Unprocessed carboxymethylcellulose and its salts

This category covers carboxymethylcellulose and its salts in unprocessed form. The material must be carboxymethylcellulose or a salt of it, rather than another cellulose derivative.

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See the official tariff text

Official tariff text

Carboxymethylcellulose and its salts, in primary forms

The path to this code

Every code is reached through these choices, one level at a time.

Step 4 of 4

Step 1 · Section VII Plastics and articles thereof; rubber and articles …
Is the product made of plastic, or is it made of rubber?
✓
Step 2 · Chapter 39 Plastics and articles thereof 1 of 2 chapters in section VII
What kind of plastic product is it: an unworked polymer or ion exchanger, plastic waste, a monofilament, rod or profile, a pipe or hose, a floor or wall covering, a flat plastic form, a sanitary item, a transport or packaging item, a household or toilet item, building equipment, or another plastic article?
✓
Step 3 · Heading 3912 Cellulose and its chemical derivatives, n.e.s., in … 12 of 26 headings under chapter 39
Is it cellulose acetate, and if so is it plasticised; cellulose nitrate; carboxymethylcellulose or its salts; another cellulose ether; or another cellulose or chemical derivative?
✓
Step 4 · Subheading 3912 31 Carboxymethylcellulose and its salts, in primary fo… 4 of 6 subheadings under heading 3912
Is it carboxymethylcellulose or one of its salts, in unprocessed form?

Full 8-digit codes

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1 code below this one

3912 31 00 Carboxymethylcellulose and its salts, in primary forms 6.5% Save

Compare the sibling codes

Classification decides the rate here: from 0.0% to 6.5%.

3912 11 Non-plasticised cellulose acetates, in primary forms 6.5%
3912 12 Plasticised cellulose acetates, in primary forms 6.5%
3912 20 Cellulose nitrates, incl. collodions, in primary forms 6.0–6.5%
3912 31 Carboxymethylcellulose and its salts, in primary forms you are here 6.5%
3912 39 Cellulose ethers, in primary forms (excl. carboxymethylcellulose and its salts) 0.0%
3912 90 Cellulose and chemical derivatives thereof, n.e.s., in primary forms (excl. cellulose acetates, cellulose nitrates and cellulose ethers) 6.4–6.5%

Export to Norway

What Norwegian customs charges when goods like these are imported into Norway.

39.12.3100

Carboxymethylcellulose and its salts

Ordinary duty

Duty free

Goods of EU origin

Duty free You need documentation of EU origin to use this rate.

Norwegian tariff data version 1.5/1.2, last checked Aug. 3, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

Export to the United Kingdom

What UK customs charges when goods like these are imported into the UK.

3912 31 00 00

Carboxymethylcellulose and its salts

Ordinary duty

Depends on the product details

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.

These rates apply in Great Britain. Different rules may apply for goods entering Northern Ireland.

UK tariff data version v4.0.1576, last checked Aug. 3, 2026.

Contains public sector information licensed under the Open Government Licence v3.0.

Source: UK Department for Business and Trade (data.api.trade.gov.uk).

Check the neighbouring codes

The codes just before and after this one, in case a nearby group fits better.

See all 6 codes at this level

Previous code 3912 20

Cellulose nitrates, incl. collodions, in primary forms

you are here 3912 31

Carboxymethylcellulose and its salts, in primary forms

Next code 3912 39

Cellulose ethers, in primary forms (excl. carboxymethylcellulose and …

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with SKAT, TARIC, Norwegian Customs or the UK Online Trade Tariff before you file. The rate you pay can also depend on the country of origin. These are base customs duties only: import VAT, excise duties, anti-dumping duties and safeguard or quota measures are not included.